“Guardians of the Galaxy” opened in theaters Aug. 1 to become Marvel’s latest success — the quirky cosmic adventure is closing in on more than $200 million in domestic box office, and a sequel is already on the calendars for July 28, 2017.

While audiences responded to the film’s wild menagerie of creatures and interstellar locales, many shared a favorite moment. The scene in question takes place at the end of the movie and involves Groot, the sentient tree voiced by Vin Diesel, one of the five members of the “Guardians” team that also includes Chris Pratt’s Peter Quill, a.k.a. Star-Lord; Zoe Saldana’s green assassin, Gamora; Dave Bautista’s vengeful Drax the Destroyer; and Groot’s pal Rocket, a machine-gun-wielding raccoon voiced by Bradley Cooper.

Check it out below — unless, of course, you haven’t yet seen “Guardians,” in which case you might want to wait to avoid spoiling the moment (which actually does relate to a fairly important plot point in the film).

Although he had not previously been familiar with the character or the comic series, Diesel told Hero Complex he was intrigued by the unusual challenge of playing Groot, specifically the notion of saying one line any number of different ways to convey different ideas.

“When you’re presented with something bizarre like that, the optimistic side of you finds the challenge and says, ‘OK, it’s only three words, but what if I really went all in?'” Diesel said in an interview last month. “What if I really treated it like it was Shakespeare, if it had as many lines as you could imagine?”

He did have reservations about accepting the role, however.

“There’s such a beautiful innocence about Groot that’s not like any of the other characters I’ve played,” Diesel said. “I was a little apprehensive about how the world would [respond to] a huge action hero playing a character that is not a huge action hero, that is not playing up to my physicality. It’s almost the antithesis in many ways.”